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Server callback now rejects succeeded submissions without a non-empty answer, or whose answer contains [citation:N] markers without any sources. Desktop adapters mirror this client-side: kimi returns unknown when sources arrive without a final answer, and yuanbao returns unknown when the answer has unresolved citation markers. Yuanbao also unwraps redirect URLs, harvests citations from more DOM attributes and document URL fields, drops links pointing back at yuanbao itself, and dedupes overlapping streaming fragments. Runtime controller forwards only an explicit "succeeded" status as success; anything else becomes failed. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>